Howdy:

I got just what you are looking for... how about the 'WWII Prison Camp
Short-wave Receiver' ?

The circuit is claimed to be from, "United States Army in WWII The Technical
Services, The Signal Corps: The Outcome, U.S. Government Printing Office,
1966."

Check the circuit at:
http://www.webex.net/~skywaves/SPY/spy.htm

I collected parts but never had a chance to build it---old metal canteens
are hard to find.

RG
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Ed wrote in message
2.175...

I am looking for a nice schematic, and perhaps additional info, on a 12V
(fil. & plate) tube superhet Rx; just something fairly simple for CW/SSB
reception without bells and whistles, and preferably for 75M/40M
reception.

Can anyone point me to info on this? Thanks.



Ed K7AAT

hay dont forget the r392 it was a 24 volt plates
On 23 Jun 2005 12:56:12 -0700, wrote:


Setchell-Carlson managed to do it with loctal-base tubes running
off of a 24/28 VDC aircraft bus back in WW2 times. No dynamotor,
just that cute little box referred to as a "range receiver" or
BC-1206.

I bought a couple of them many years ago, surplus, principally
to get the nice compact 3-gang variable capacitor. Fired one
up in the company lab at 26 VDC and it was still in-spec although
those specs weren't the best. At 24 VDC the spec rating was
marginal. At 22 VDC it was below spec...but then the filaments
were also running cooler at 11 V each.

Don't remember what the IF (135 KHz) BW was, but, running with
a crystal-controlled converter ahead of it, the 195 to 500 KHz
tuning range could cover 75 or 40 meters no problem. A thought.